Vulnerability identifier: #VU59162

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-40111

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache James
Server applications / Mail servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop when parsing APPEND and STATUS IMAP commands. A remote user can send  a specially crafted command to the server, consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache James: 3.6.0, 3.5.0, 2.3.0 - 2.3.2.1, 3.4.0, 3.3.0, 3.2.0, 3.1.0, 3.0 beta2 - 3.0.1, 2.2.0, 2.1 - 2.1.3

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External links
http://seclists.org/oss-sec/2022/q1/3

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.